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zubair136

RS485 COmmunication

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Hi all,

i am looking for a solution to connect 7 plc with a single scada. is it possible according to my topology diagram ?

 

Kindly make me suggestion and if you have any information regarding the solution then share .

 

Thanks in advance. 

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If I remember it correctly, that yes, up to 16 slave nodes by computer link protocol. However, I'm warning to build the network using the FX2N-485-BD due to these interface boards has non-isolated RS485 interface, which is correctly to use inside the electrical cabinet only. To use FX2N-485ADP is a right solution.

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thanks Inntele for your precious reply. 

 

infact i want to share some registers from plc 1 , PLC2  ------ PLC into scada. but as far i am looking for . it shows bit.  

 

can you please share some material or some hints. 

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I may be wrong, but since the PC side is RS-232 it can only communicate with one device?

Or is it solved through driver/software?

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3 hours ago, glavanov said:

I may be wrong

Yup.  The single master on an RS-485 channel can query all of the slaves, without regard to physical conversions on its end.

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21 hours ago, zubair136 said:

thanks Inntele for your precious reply. 

 

infact i want to share some registers from plc 1 , PLC2  ------ PLC into scada. but as far i am looking for . it shows bit.  

 

can you please share some material or some hints. 

It depends on the OPC server and its PLC polling. In real any type of memory cells are available for reading/writing.

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